Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

NPA: 443 [Rate centres in NPA 443] [Dial plan for NPA 443]

NXX: 946

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
443-946 A Parkville MD BLTQMD01BMD  2593 CORE COMMUNICATIONS, INC.- MD 238      
443-946 0 Parkville MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2020-04-06   
443-946 1 Parkville MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2020-02-12   
443-946 2 Parkville MD BLTMMD91GT0  2593 CORE COMMUNICATIONS, INC.- MD 238   2019-05-01   
443-946 3 Parkville MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-10-23   
443-946 4 Parkville MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-10-23   
443-946 5 Parkville MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-10-23   
443-946 6 Parkville MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2017-11-13   
443-946 7 Parkville MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2017-11-13   
443-946 8 Parkville MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-10-23   
443-946 9 Parkville MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2017-10-27   

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.